Hydraulic control for finishing rolls of terne plate rigs



1952 E. A. MATTESON HYDRAULIC CONTROL FOR FINISHING ROLLS OF TERNE PLATE RIGS 5 Sheets-Sheet 1 Filed Aug. 6, 1949 ATVTQR/VE 75 Feb. 12, 1952 MATTESON 2,585,482

HYDRAULIC CONTROL FOR FINISHING ROLLS OF TERNE PLATE RIGS Filed Aug. 6, 1949 5 Sheets-Sheet 2 I N V EN TOR. f/w/n A. ffmfe 50/? Feb. 12, 1952 E MATTESON 2,585,482

HYDRAULIC CONTROL FOR FINISHING ROLLS OF TERNE PLATE RIGS Filed Aug. 6. 1949 5 Sheets-Sheet 3 IN VEN TOR.

ATTORNEYS Feb. 12, 1952 A, MATTESQN 2,585,482

HYDRAULI ONTROL FOR FINISHING ROLLS TERNE PLATE RIGS 1 Filed Aug. 6. 1949 5 Sheets-Sheet 4 ill-"I ni g! Illl 7 5/ /47 Q a; 22 Fm] /04 g U 55 As INVENTOR.

[721m A. M27250 MKM A 7' TOR/VEYS Feb. 12, 1952 E A MATTESON 2,585,482

HYDRAuLI C'ONTROL FOR FINISHING ROLLS OF TERNE PLATE RIGS Filed Aug. 6. 1949 5 Sheets-Sheet 5 r 9 INVENTOR.

ATTOR/VEVS Patented Feb. 12, 1952 UN I'TED' S TAT -ES :PAT EiN'T OFFICE HYDRAULIC CONTROL FOR FINISHING ROLLSOF TERNE PLATE 'BIGS Elwin Ar Matteson, Youngstown, 'Ohio,.- assignor to The Aetna-istandard Engineering Company,

Youngstown, Ohio, a corporation ofO'hio Application August 6, 1949,.Serial No. 109,026

7 Claims. '(Cl. .118',114)

This invention relates -to a coating rig and,

.moreparticularly, to a coating rig comprisingya -f-rame; a pot withinthe frame containinga coating liquid; meansiorguiding the material .1201 be coated into, through and out of the pot; coating-rollassembly located in the pot above the ,-level; of the coating liquid; and, determining the spacing of the rolls in the coating roll assembly, -amechanico-hydraulic systemmounted. on the frame in juxtaposition to the coating. roll assembly.

vI-namore specific-aspect, the invention-relates toa. rig. of this kind whichmay be used-ior applying a. coating liquid to continuous or. discontinuous lengths of strip material. The coating liquid contemplated in the preferred embodiment of the invention, described hereinafter, is molten-metal; however, the coating liquid may if desired take the form of an organic material Where terne plating or some similar operation. vFor convenience, the inventionwill be described hereinafter as used in a continuous process ofmanuf-acturing. terne plate.

One of the. major objects. of-the invention is to provide a. rigof this, kind lending itself. to-the production of uniformlycoated strip. material.

.Other objects of the invention are, inter alia,

-to.=;pnovide: a coating rig in whichthe thickness of the coating. may readilybe varied by efiecting suitable adjustments outside the rig it'sel'iand particularly outside the coating. pot forming. part of. therigg, to provide a. coating rigin which the spacingbetween co.-acting rolls in the coating roll. assembly may be. equalized fromlend, to. end

thereof by increasing or decreasing. the forces operating on. one end of thecoating roll assemblywhile maintaining unchangedthe forces acting on the other end of the coating rollasscmblypandi to provide. a; coating rigin which,

once the adjustment required to give a. desired thicknesshas beenmade by the operatonadjust- .mentior wear in the coating. roll assembly is made. automatically in response to. forces originating outside the. coating roll, assembly.

.Another objectof the invention is to provide .a coating rig. characterized by .a strong sturdy,

aetsimplecoating roll assembly inwh-ichiadiustments and compensation for wear are efiected by means. of a. mechanico-hydraulic.control sys- .tem. disposed largely inspace, inthe rigwnot otherwise used. thatis made available by vforward --inclination.yof-; the. coating roll assemblyand in which one .or more roll. wiper assemblies can .-conveniently be incorperated. iniuxtaposition. to

the coating rolls themselves without interference with or ,fromthe mechanico-hydraulic control system.

Still anothervobj,ect. of the invention is to provide a coating roll assemblyincorporating a subframe .supportedfrom. the main. frame of the coating rig made up in part: of twoside pieces or panels having...therein. openings. in are received bearing block. supports each. of' which in turn receivesa. plurality of bearing blocks mounting the. necks oil the coating. ro11's,.- such bearing .blocksrand, bearing block .suppioriz's being capable oi relativemovement topermitcloser ,approachof the 'coatingrdll's. as wear occurs, this notwithstanding. use of bearing block. supports and overlying cap members to. journalcertain elements of. the. -,gear train. serving .to transmit power. to the individualrolls forming part of the coating, rollQassembly- Other objects andadvantages of the invention. will be apparent ,from .the. accompanying drawings, in which. Figure .1. isavert'ical section, with partslinlelevation, .along the central longitudinal. axis of. themachine .as. .a whole; Figure 2 .isv an end elevation onflan enlarged scale of the coating rolls. and associated parts, the coating. pot appearingin section; Figure 3 is a, corresponding.transverseelevation, with partsin sec- -.tion,, of the. coating. rolls. and associated parts as seenfitom the rightihFi'gure, 1. but for convenience illustrated as if.disposedlvertically;Figure an. enlarged. end' elevation. of .the' roll drive system as it would be seen from ,l'ihe.4 l of Figures; Figure 5. is .a correspondingend elevation. of the .roll drivesystemasit would be seen from; line 5+5 of. FigureBl; Figured is an elevation, with parts. in section and other parts omitted entirely ofloneuofl the two roll Wiper assembli'es,,.the same being, illustrated as in Figure ,,3.; .Ei'gnrefl. is. a.-.ver.tical section with parts in elevation, along, line i'll" of Figure I6, the section correspondinggenerally to that of' Figure 2 but. onev of. the panels being omitted to reveal details of the roll. wiper. ,assemblies.;,, Figure 8' is a plane-of .the cylinder supportingmeans, hy-

draulic cylinders,,.,and .,associated piping; and Figure. 9- is. a schematic. representation of the? hydraulic system.

Referring, first toFigur-e ,1, what is there shown is a metal .frame I}; disposed, largely below ,iloor level, within which is av lining. of insulating brick,

the same beingdesignated :2'. Interiorly-..0f'brick 2 is thelmetal coating ,p'ot3 whichior the mostpart; projects upward .very slightly be- ,yondrthetop of frameml hut'towardtheri'Qhb hand end vthereoiihas .an: upward extension 13a.

. 4 which divides the coating pot into two parts,

one of which contains the heating and charging elements and the other of which contains the coating roll assembly.

Underlyin both parts is a coating metal pool 5, the same reaching to approximately the level of line LL. Floating thereon but reaching within extension 3a a level approaching the top of partition l is a supernatant oil pool 5, the same consisting of palm oil, mineral oil, or a mixture of both. Within the part of the pot to the left of partition d as seen in Figure l, the oil reaches a height of a few inches only; to the right of partition i, it is of a depth sufdcient to cover most or all of the coating roll assembly. The supernatant oil pool is commonly employed in this manner in coating rigs and for that reason further reference to it will not be made.

To the left of and above the level of the coating pot 3 are feed rolls la and lb, the same constituting the means for guiding into the coating pot the material being coated, usually continuous strip material. At the opposite end of coating pot 3 are two pairs of catch rolls to and 8b, such rolls constituting the means for guiding out of the coating pot the material being coated. Between feed rolls la and lb and catch rolls to and 8b the material being coated follows the path P, passing through an opening 9 in partition 4 in proceeding from the left-hand part to the right-hand part of coating pot 3.

In the part of coating pot 3 to the left of partition a are heating elements Ha, lib, Hc, etc., the same taking the form of immersion heating elements of conventional type. They form no part of the present invention except insofar as they serve to keep the metal in coating pot 3 in liquid condition. immediately to the left of partition 4 is charging apparatus l2, the same likewise being of a conventional type. Within the free area in coating pot 3; i. e., the area not occupied by heating elements Ha, lib, 0, etc, and the charging apparatus 12 are an upper guide assembly l3 and a lower guide assembly .Hi. Between them lies the path P of the material being coated.

Immediately to the right of partition 4 and in juxtaposition to opening 9 are an upper guide assembly l5 consisting of a series of parallel guide rods lda held in place on an apron [5b and a lower guide assembly l6 likewise consisting of a series of parallel guide rods lEa held in place on an apron Iiib. Upper and lower guide assemblies 15 and H5 serve to guide the material being coated to the lower or near end of the coating roll assembly l8. Together with guide assemblies l5 and i5, coating roll assembly is occupies most of the area of pot 3 to the right of partition 3 other than that taken up by the secondary heating element I'l.

Associated with coating roll assembly (8 is a mechanico-hydraulic control system, generally designated is, to be described hereinafter.

As seen in Figures 2, 3 and 7, the coating roll assembly is mounted between two side pieces or panels 21 and 22, the former being thepanel on the near side and the latter panel on the far the means whereby the two side panels 21 and 22 are mounted in the apparatus. In the case of rearwardly extending portions 21b and 22b, the latter also serve as means from which parts of the mechanico-hydraulic system l9 are supported. To that end, side panels 2! and 22 are located on the one side on brackets 23, 23, extensions 21a, 22a, thereof being adjustably positioned on the brackets by means of adjusting screws 24, 24', and, on the other, by means of adjusting screws 25, 25, bearing against the top of partition 4. Adjusting screws 24, 24' and 25, 25', along with other adjusting screws suitably located relative to side panels 2! and 22, serve to position the side panels in lateral alignment with each other and in proper relation to the rest of the installation.

As shown in Figure 2, side panel 2|, to which side panel 22 is similar in substantially all respects, is generally U-shaped, the bight therein taking the form of a generally rectangular open ing, designated 26, extending from the upper part of the panel to a point at approximately the level of the line LL marking the top of the molten metal in pool 5. Adjoining rectangular opening 26 on the left-hand side thereof as seen in Figure 2 are three lesser openings 21, 28 and 29, the purpose of which will appear hereinafter. Rectangular opening 26 is so located that its long sides define an angle of roughly 15 to the vertical; by the same token, its short sides define an angle of roughly 15 to the horizontal. In consequence, the coating rolls mounted in rectangular opening 26 inclined forward in the apparatus as indicated in Figures 1, 2 and 7.

Extending between side panels 2| and 22 are the coating rolls, arranged in pairs. There may be one pair or more than one pair, as desired, although in the preferred embodiment of the invention, shown in the drawings, three stacked pairs are utilized. The forward or anterior roll in the bottom pair is designated 3|; the rear or posterior roll, 32. The anterior roll in the middle pair is designated 51; the posterior roll, 52. In the top pair, the anterior and posterior rolls are designated SI and 62, respectively.

Referring to Figure 3 and for the moment to anterior roll' 3|, the same is provided at the lefthand side thereof with a cylindrical neck 33 adapted to rotate within roller bearings 34. The latter are held in place in a bearing block 35 the interior of which has the shape of a hollow cylinder and the exterior of which takes the form of a cube or other rectangular parallelepiped. Bearing block 35, which thus serves as the supporting means for neck 33 of anterior roll 3!, is characterized also by upper and lower peripheral flanges, shown indotted lines in Figure 2, which are located at the base of the bearing block in proximity to the adjacent end face of anterior roll 3]. Accommodating the body but not the flange at the bottom of bearing block 35 is a bearing block support 36, shown to best advantage in Figure 2, which as seen in end elevation is roughly channel-shaped. Bearing block 35 fits into the right-hand end of channel 31 in bearing block support 36 with its lower flange abutting the inside face of the bearing block support. The latter in turn fits snugly into the rectangular opening 26 in side panel 2! with its two lateral flanges 36a and 361), shown in dotted lines in Figure 2, abutting the inside face of the panel.

A like bearing block support, facing in the opposite direction, is similarly located in the rectangular opening in side panel 22.

The channel 31 in bearing block support 36 outside face of the panel.

and the like: channel in the bearing-block support in. side. panel 22 arelargely,- but notentirely, occupied by bearing blocks supporting the necks of anterior roll 3| and the twoilike-bearing blocks, one at each end, supporting the necks of posterior roll 32. As indicated in Figure 2, the bearing blocks at the same endof the coating: roll assembly are so proportioned that part. of the original channel in the bearing block support remains open at the center as shown in Figure 2. Thus, there is considerable clearance between them, but not between the rolls themselves, after the bearing blocks are positioned in their respectivebearing block supports. The bearing blocks supporting anterior roll- 3| tend to slide toward the anterior ends. of the. channels in the bearing block supports. by virtue ofvv the above-described inclination of the coating roll assembly; similarly, the posterior bearing blocks need-not and ordinarily will not fit snugly against the adjoining upright side of the bearing block support, being urged by gravity and otherwise toward a position in which posterior roll 32 would be in contact, but for the presence of the material being coated, with anterior roll 3|.

In the lower left-hand corner thereof as seen inFigure 2, bearing block support 35 is slotted to provide an end opening 38 spanned by a pivot pin 39 on which, within opening 38, is mounted a bell-crank lever 4|. The latter is provided with an inboard arm 42 bearing against the proximate side of the bearing block mounting posterior roll 32 and an outboard arm 33 characterized by a. lateral off-set 43a by which bellcrankllever i2 is caused to project out of the plane of side panel 2i to an extent sufficient to enable the end of outboard arm 53 to clear the At the outer end of outboard arm 43 is a yoke 44 pivoted to an upwardly directed connecting rod 35.

The arrangement just described, which is that characterizing the near end of the bottom pair of rolls as seen in Figure 2, is substantially duplicated at the opposite ends of rolls 3| and 32. However, referring to anterior roll 3! as seen in Figure 3, the latter has at the far end thereof a roll neck 46 provided with a roll neck extension 47 carrying a gear. d3 held thereto by a key and key-way 4Q. Ro1l'32, the posterior roll of the bottom roll pair, is likewise provided with a roll neck extension and a gear keyed thereto. gears, which form part of the power train, do not mesh with each other but instead mesh with two idlers which will be described hereinafter.

Referring again to Figure 2, the middle row of rolls is made up of anterior roll and posterior roll 52. The rolls are sup-ported as shown in two like bearing blocks which are generally similar to bearing block 35, such bearing blocks being themselves positioned in, bearing block support 53. The latter is generally similar to bearing block support 36, which underlies it, being provided with an end opening in which is pivotally mounted a bell-crank lever 54 similar to bellcrank lever cl. However, bell-crank lever 54 has a lateral off-set 54a which extends oppositely to off-set 43a of bell-crank lever 4|. This state of affairs causes the outboard arm of bell-crank lever 5-4 to project not in the'same direction as the outboard arm of bell-crank lever i but in the opposite direction relative to side panel 2|. As a result, the end of the outboard arm of bellcrank lever 54, and therefore connecting rod 55, is. positioned on the far side of side panel 2|, as indicated by dotted lines in Figure 2'.

. In these and other respects, bearing block These port 53.

support-53m" the nearend of the coating roll same dimensions as bearing block support. 53.

It is similar thereto in all respects except that toward .theibottom thereof itis provided with two cognate transversely extending. circular' openings receivingtwo stationary pinsonwhichare rotatably mounted the two idlers previously mentioned.

Figure 3 shows a stationary pin El carrying an idler 58' meshing with the gear 48 on the. roll neck extension ll formingpart. of roll 3| of the bottomroll pair. A collar 59" serves. to retain idler 58 inplace on stationary pin 57!. Back of it is a similar pin, paralleling pin 57, carrying an idler meshing with the gear mounted ontheroll neckrextension forming part of posterior roll 32 of thebottom roll pair. Each. idlerineshesnot only with the gear therebelow but also with: a like gear thereabove mounted on the roll neck extension of one of the rolls of the middle roll pain-gear fiiion the roll neck. extension of anterior roll 5| appearing in Figure 3. The relationship between the gears is illustrated in Figure 4.

The rolls of the top r011 pair comprise anterior roll 5| and posterior roll 6-2, the same being carried in bearing: blocks and bearing block supportssimilar to thoseused with the rolls of the middle roll pair. Bearing block. support 63 carrying the bearing blocks at the-near end of the rolls of. the upper roll pair. is shown in Figure 2, the same being'similar to and of substantially the same dimensions as bearing block sup- Bearing block support 63, is slotted at the end thereof and equipped with a bell-crank lever 64 characterized by a lateral off-set 64a. The latter serves to project the outboard end of bell-crank lever 66* outwardly of side panel 2| as shown in Figure 2, so that connecting rod 65, which is pivoted to bell-crank lever 64, appears in full linesin-Figure 2.

At theopposite ends. thereof, the ro'llsof. the top r011v pair are; constructed and supported sirn ilarly to the rolls of themiddle roll. pair; that istoz say,. a; bearin block support is provided which isequipped with; circular openings carrying stationary pins. mounting. idlers. which are held-inplace. by. collars,.just.as in theicase of the pins, idlers and' -collars'underlying. them on. the

cates the mannerzinwhich idler 66 is. rotatably carried. by a stationary pin El, being retained in'pla'cethereon by the collar 38. Idler iifi'meshes the gear. Edthereb'elow and with a gear 39. thereabove, the latter being mountedmntheroll neck extension forming. part. of anterior roll; 61. on the: top roll pair; Posterior roll 92 is similarly constructed, equipped andarranged. Reference is madelto thesh'owing in Figures, from: which it appears. howv the gearsat the-ends of the rolls of. the toproll pair. mesh .withthe idlers immediately-below them.

Attention is particularly. called to'the fact that unlike the. idlers between. anterior rolls in the coatingroll assembly, the axes of which are alignedwith the axes of the anterior rolls asindicated by line A-A in Figure 4,-the idl rs between posterior rolls are mounted forwardof I the plane; represented by the line B--B, or: the

mit continued intermeshing of the idlers and gears notwithstanding wear on and resulting forward movement of the posterior rolls under the influence of the mechanics-hydraulic control system hereinafter described.

At the opposite ends thereof, anterior and posterior rolls 6! and 52 difier from the corresponding ends of the rolls of the middle and bottom roll pairs in that they are provided with roll neck extensions on which are fixedly mounted gears meshing with two mutually intermeshing idlers one of which meshes with a driving pinion. As appears from Figures 3 and 5, the gears at this end of rolls 6! and 62 are designated II and I2;

respectively, they mash with idlers I3 and I4 mounted on stub shafts I5 and "I6. Idlers I3 and I4 intermesh with each other and one of them, idler I3, meshes with the pinion 79 on drive shaft 80. Stub shafts I5 and are journaled at their inboard ends in a cap member 'II overlying bearing block support, 63. Cap member 11 fits into a correspondingly shaped recess in side panel ZI, to which it is bolted as shown in Figure 2. Formed integrally with but off-set laterally from cap member TI is a guard Ila, shown in end elevation in Figure 3. As appears from Figure 3,

stub shafts I5 and It are journaled at their outtime, but necessarily in the opposite direction.

Idlers I3 and I4 respectively rotate gears II and I2 mounted on the roll neck extensions forming part of rolls GI and 62, this being by virtue of the relationship illustrated in Figure 5. Power so communicated to rolls GI and 62 is transmitted therethrough to the opposite ends thereof as seen in Figure 3, where gear 69 at the end of anterior roll 6| and the like gear at the corresponding end of posterior roll 62 mesh with and rotate the idlers immediately therebelow, which in turn mesh with and rotate the gears on rolls 5| and 52. Rotation of these gears serves, through the intervention of the idlers immediately therebelow, to rotate the gears at the corresponding ends of rolls 3| and 32.

Thus the individual rolls in each of the three pairs of coating rolls are rotated positively and simultaneously, but in opposite directions, in a manner such as to impart an upward movement to the material passing therebetween, all as indicated in Figure 4.

On cap member I8 are two flanges 85 and 86 which project inwardly of side panel 22, the same appearing in Figure 7. On opposite cap member II are two similar flanges projecting inwardly of side panel 2i one of which, 81, appears in Figures 3 and 6 along with flange 85, on cap member I8. In substantial alignment with these flanes are brackets disposed below the lower ends of the rectangular openings in side panels 2I and 22. Such brackets are shown, for example, in Figure 7, wherein appear the two brackets 88 and 89 aflixed to the inside face of side panel 22. On the inside face of side panel 2| are two coun terpart brackets one of which, 90, appears in the lower left-hand corner of Figure 6 opposite bracket 88 on side panel 22. Thus on each of side panels 2| and 22 are two flanges and two brackets, the flanges overlyin the brackets in the manner and to the extent shown in Figures 6 and 7. These flanges and brackets serve to support two roll wiper assemblies, one located anteriorly and the other posteriorly of the coating roll stacks.

Extending parallel to the coating rolls between .the anterior flanges and 81 on cap members I8 and 7.1, respectively, and between the corresponding posterior flanges on the same cap members; i. e., the flanges on the opposite sides of the rectangular openings in side panels 21 and 22, are two cross pieces taking the form of angle irons the ends of which are rigidly fastened, as by bolts, to the respective flanges. One of these, cross member 9i, appears in elevation in Figure 6, while both of them, 9i and 92, appear in section in Figure 7. Connected thereto as hereinafter described and located opposite the rolls of the middle roll pair are two other cross pieces, taking the form of modified angle irons, designated 93 and 94, the former appearing in Figure 6 and both appearing in Figure 7. Connected to cross pieces 9|, 93 and 92, 94 and located below the rolls of the bottom roll pair immediately above brackets 88, 89, 90, etc., are two other cross pieces, designated 95 and $6, the former of which appears in elevation in Figure 6 and both of which appear in Figure 7 in the form of sections of angle irons. These various cross pieces form parts of the wiper blade frames, of which there is one for each roll wiper assembly.

As indicated in Figure 6, the wiper blade frame on the forward side of the coating roll assembly includes, along with cross pieces 9|, 93 and 95, six upright members 91, 90, 99, I90, NH and I02, these members likewise taking the form of angle irons. Six similar upright members form part of the wiper blade frame on the rearward side of the coating roll assembly, one of them, I03, appearing in Figure 7. To accommodate the several upright members, with which cross pieces 93 and 94 would otherwise interfere, the latter are cutaway as necessary. The various cross pieces and upright members are welded together to form roll wiper frames as generally indicated in Figure 6.

Welded to the Wiper blade frames at their bases and cooperating with suitable holes in brackets 88, 89, 90, etc., are four pegs I04, I05, I06, etc., pegs I04 and I06 being shown in Figure 6 and peg I05 appearing in Figure 7. Both frames are principally supported from side panels 2| and 22 by being bolted at their tops to flanges 85, 86 and 87, etc., being held in position against lateral displacement by insertion of the pegs in brackets 88, 09, 90, etc. At the upper ends of the respective upright members are reinforcements I01, I98, I09, H0, HI and N2, the same taking the form of square plates welded to the ends of the angle irons which form the respective upright members. A like reinforcement H3, one of six on the wiper blade frame not appearing in Figure 6, is shown in Figure 7. Bolts H4, H5 and H6, the latter being one of a pair at opposite ends of the coating roll assembly, appear in Figures 6 and 7.

Surmounting and bolted to reinforcements I01 and I08 is an oblong plate I20 which has counterparts in a plate I2I bolted to reinforcements I09 and H0, and a plate I22 bolted to reinforcements III and II2. A similar plate I23 surmounting reinforcement I I3 appears in Figure 7.

These-plates serve asspring seats and guides for; the spring assemblies and wiper-rodsto=be de.-.- scribed. For each such plate :there arezthreez wiper "rods; one short one, one Otinterrhediate length and'one longone, each passing through: a .hole in the plate andsurroundedj-above the; plate by a compression spring.

The. short rods on the forward wiper: blade frame, seen in Figurev 6, are'designated- I25,.I26.- and I2'I. Each is providedat its lowerendwith as bracket' and a channel-shaped retainer for the soap stone Wiperblade .ifiilshown in section in Figure 7. The short rodgat the end of the rearward wiper blade frame appears in Figure 7 7,. wherein it is designatedv I28.-- The channelshaped retainer on the short rods of the rearward r wiper blade ,frame is shown in section in Figure"? as. supporting soap stone wiper bladeISil. At the;- opposite end of rodsjxitt, I26 and I2] are spring. assembliesItI, i 32 and 5-33, the same comprising compression springs and spring retainers sur-- mounted-by'nuts cooperating with appropriately threaded portionsof the rods. A like spring -assembly- I34-appearsin Figure '7 at the upper end of short rod I 28'..-

As. appears from Figure 6,.three rods of intermediate length designated I35, I 36 and-I31 de-. pendsfrom spring assemblies overlying plates I20,- I2l=and I22, respectively Three similar rods of intermediate-1lengtharer mounted on the wiper blade frame on thetrearward side f-the;c0ating roll assembly. Thelatter do not appear in Figure 6; however, one of these rods, designated I38, appearsin part-in Figure 7.. Supported by rods I35,- I36 and I3! just below the middle of the wiper bladeframe shownin- Figure 6 is the roll wiper: blade- I39, the same-being held-in place by a channel-shaped retainer mounted in brackets-affixed, asbywelding, to-rods I35; I 35 and-.I3I. Alike rollwiperblade I 40.--is similarly attached to the, rods of intermediate length forming-part of the wiperblade frame shown in end elevation toward the-left-handside of Figure 7,- where such roll wiper'blade isdesignated I40. Overlying'rods I26; I2I .and I22 asshown in Figure 6:are spring assemblies MI, I42 and I43, including nuts, spacers, and springgretainers.

The opposite wiper blade, frame likewise in cludes three spring assemblies, oneof which is shownin part in Figure .7. Mounted parallel to short rods. I25; I 26' and. I 2?! and intermediate rods,-I35,- I35 and- IBF-are three long rods, I45, I46 and Id'l, such 'rods'being: located as shown in: Figure vdin the-wiper blade frameonthe forward sideof the coating-roll assembly; LOngfI'OdS'I45,

l ltrand J41, by meanssof brackets and channele shaped retainers, carry a soapstone wiper blade- I49-.- Three like rods in-the: wiperblade-irame on the-opposite side of thecoating roll assembly, one of vwhich, I48, appears in'Figure '7, carry a similar blade I50. The spring assemblies overlying-dong: rods I45, I45 and I4! are designated I5I, I52 and I53,r.respectively. Thespring assemblies overlying long rod I48 does not appear in the drawings being concealedifrom viewrini'eachpf Figures 6 andJL.

The three rods of intermediatedength.andthe three long rods in each roll wiper assembly of necessity pass-"through openingsin cross member 93 or 9.4;.as the case may be,- while the short-rods; are: extended downward below the .wiper' blades to permit themalso .to...pass through andfthltsbe guidedby cross members93. andfifi:

a-..r0ll;wiper. assembly:soxconstruoted; an: upward: pressureis. constantlwexerted by'wiper 5" of the middle pair.

blades-129' and I3d-against the lower sides ofithe Similarly, an upward.

rolls of the top roll, pair. pressure isconstantlyaexerted by. wiper blades I39and-I4Il against the lower'sides of the rolls of the bottom-roll pair. Thus regardless of minor variation in the relative positions of, the rolls making up a given roll pair, the wiper blades 10 serve to move excess coating metal therefrom.

A-rnechanico-hydraulic system for determining the relationship to each other of the rolls of each roll pair is located in-the space immediately behind the coating roll assembly, more particularlythe space which results from inclining. the coating roll assembly forward as above described; 1. e., at an angleof approximately 15 from the vertical. Such mechanico-hydraulic system includesa box-like tram-z:- I58, open at its ends,

*which ismounted 'on extensions b and 22b of side" panels ZI and22, respectively. Three hydraulic cylinders designated Itl, I52 and 53 are located at the end'of frame Hit overlying side panel ZI; similarly, three hydraulic cylinders 25 designated I64, I65 and'lfifi'are located at the end offrame ltllroverlying side panel 22. Looking axially of-the machine asa whole, cylinders IGI and IE2 are inalignment, so that the former does not appear in Figure 3; similarly, cylinders Hand I 65' are in alignment, so that cylinder i'dddoes not appear;

As indicated in Figure 8, cylinder I53 is off-set laterally from cylinders Iiil and H52, being located on the opposite side of side panel 2I; cylinder- Ittlis likewise oii-set laterally from cy1- inders I64 and I65being located on the opposite sideof side panel 22. Thus cylinders i5l, 182, I64. and I65; together with their respective piston rods, lie outside side panels 2I and 22 that isto 40 say, on the sides away from the coating roll assembly; Cylinders I63 and I 56,0n the other hand, lie inwardly of side panels 2! and22, as do also the piston rod associated with them.

The piston rods depending from cylinders ItI 45.: and I62 are linked to connecting rods 65 and 55,

tionswhih require their outboard arm to project outward through the openings in side panel 2I designated Hand 29, respectively. Thus connecting rods and appear in solid lines in Figure'Z, while connecting rod 55, which is linked 55-at one end to the piston rod depending from cylinder'lfi3and 'atit-s other end to the outboard arm of'bell-crank lever 5 3; is seen in solid'lines through-opening 28 and elsewhere is represented by dottedlines. A' like state of affairs obtains at the opposite endof the mechanico-hydraulic system; seen in Figure '7, where the connecting rod servingthe: bell-crank lever associated with opening zfi" appears-in-solid lines as'connected to cylinder-I55; while the connect ng rods serving the bell-ecrank levers associated with openings 21. and 29 appear largely indotted lines.

As" indicated in Figure 3; the two groups of cylinders overlying side panels-2! and 22, respectively, are servedybypipes-coupled tothecylin- T0=ders-above and below the pistons (not shown).

Normally, pressure-fluid such as oil is admitted to the space below the piston and withdrawn from the space above the piston in each cylinder, thus forcing-the respective pistonrods, connecting rods (filandioutboard ends of* the: several bell-crank Wiper blades i 29 and We. maintain an upward: pressure againstthe rolls 11 levers to their elevated positions. in the application of force by the inboard ends of the bell-crank levers, acting through the end openings in the bearing block supports with which they are associated, to the posterior bearing blocks, roll necks and rolls, thus urging them toward their anterior counterparts. The pipes passing the pressure fluid to and from the two groups of cylinders are supported by pipe supports I61 and 168, shown in Figure 3. Although for convenience indicated as broken away, the pipes are connected at their ends to four-way valves, so that, if desired, pressure fluid may be admitted to the space above the piston and withdrawn from the space below the piston in each cylinder, as may be desired at times. The arrangement as seen in plan is shown in Figure 8.

Figure 9 shows schematically the relation to the other parts of the hydraulic system of cylinders 54, 165 and 156, on one hand, and cylinders 162 and 163, on the other. The two fourway valves are designated I69 and H0, respectively. The pipes leading from them are served by pressure-reducing valves Ill and H2, the purpose of which is to keep a predetermined uniform pressure on the pressure fluid admitted to the group of cylinders. Such' pressure may, however, be varied so as to supply to the cylinders of one group fluid at a higher or lower pressure than that supplied to the cylinders of the other group, as may be necessary to adjust for inequalities inadvertently introduced in the assembly of the rolls or as a result of uneven wear on the roll necks. As indicated toward the bottom of Figure 9, the motor driven pump I13 is coupled to an accumulator H4 and a pressure switch I15, the latter forming part of the system for supplying the pressure fluid to the two groups of cylinders.

In practice, the use of fluid pressure motors in this manner has the important advantage that the force applied by the bell-crank levers to the bearing blocks remains substantially uniform notwithstanding wear in the rolls and roll necks.

If, for example, a system of adjustable springs were to be employed for the purpose of urging the rolls of the respective roll pairs toward each other, the pressure imposed by the springs would vary in proportion as wear changed the relationship of the rolls in the roll pairs; furthermore, since such springs would necessarily be located below the level of the oil in oil pool 6, it would at best be difficult to adjust the springs, and, when adjusted, the adjustment would represent nothing more than a guess as to the extent of the adjustment required to compensate for wear. On the other hand, by incorporating in a coating rig the mechanico-hydraulic system of the present invention, adjustment can be effected automatically without the need for intervention by the operator, whose services are required only at the start of the operation for the purpose of balancing the ends of the roll assembly against each other; however, if manual adjustment is indicated, as, for example, for the purpose of changing the thickness of the coating, such can be efiected by suitably adjusting the setting of the pressure-reducing valves.

It is intended that the patent shall cover, by suitable expression in the appended claims, whatever features of patentable novelty reside in the invention.

I claim:

1. In a coating rig, a pot containing a coating liquid; a partition extending transversely of the This results 12 pct from one side of the pot to the other; two side panels within the pot extending forwardly from the partition, one on one side of the pot and the other on the opposite side of the pot; a roll assembly between said side panels through which roll assembly the material being coated travels on its way out of the pot; and, urging the rolls in the roll assembly toward each other, a fluidpressure motor mechanically linked to at least one of the rolls in the roll assembly, said fluidpressure motor and the parts linking it to the roll being located between the two side panels in the space between the partition and the roll assembly.

2. A coating rig of the kind defined in claim 1 in which the roll assembly is inclined forwardly.

3. A coating rig of the kind defined in claim 2 in which the roll assembly is inclined at an angle of about 15 to the vertical.

1. In a coating rig, an assembly comprising a sub-frame; a plurality of superimposed pairs of adjustably spaced rolls mounted in the subframe, said pairs of rolls being arranged to form a forwardly inclined roll assembly through which material being coated travels in an upward path but at an angle to the vertical; a hydraulic system supported from the sub-frame on opposite sides thereof but spaced rearwardly of the zone of discharge of material passing through the rolls, said hydraulic system including a plurality of fluid-pressure motors; and, at opposite ends of the rolls, a plurality of bell-crank levers coupled by connecting rods to the fluid-pressure motors, said bell-crank levers and connecting rods being located in the space defined by the zone of discharge of material passing through the rolls and those parts of the sub-frame from which the hydraulic system is supported.

5. In a coating rig, an assembly comprising a plurality of panels mounted in parallelism to each other, said panels having registering openings therein; a plurality of rolls extending therebetween with the necks of the rolls received within the openings in the panels; caps on the panels overlying the necks of the rolls; wiper frames located in juxtaposition to the rolls with their opposite ends attached to the caps on the panels; a plurality of spring-pressed wiper blades on the wiper frames bearing against the rolls; and. mounted on the panels, a plurality of fluid-pressure motors for determining the relative positions of the rolls, said fluid-pressure motors being mechanically linked to the necks of the rolls.

6. An assembly as in claim 5 in which the caps are provided with inwardly projecting flanges to which are attached the tops of the wiper frames.

'7. An assembly as in claim 6 in which the panels are provided with inwardly extending brackets to which are attached the bottoms of the wiper frames.

ELWIN A. MA'ITESO'N.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,341,495 Covington May 25, 1920 1,528,407 Davis Mar. 3, 1925 1,699,641 Vasel Jan. 22, 1929 2,236,213 Jenkins et a1 Mar. 25, 1941 2,365,621 Bender Dec. 19, 1944 

